Damper-operating device.



R. B. RYAN.

DAMPBR OPERATING DEVICE.

APPLIGATIQN FILED APR. I, 1912.

Patented Mar. 11, 1913.

v.- m; w. m4

LANDGRAPH co..WASHlNuToN, D. c.

UNITED STATES APATENT rufo RALPH B. RYAN, OF ST. LOUIS, MISSOURI.

DAMPER-OPERATING- DEVICE.

Specication of Letters Patent.

Application filed April 1,

To all whom t may concern.'

Be it lmown that I, RALPH B. RYAN, a citizen of the United States of America., and a resident of t-he city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Damper- Operating Devices, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to a damper operating device, and it has forits object to provide an efficient, compact, simple device of this character which will positively operate a stove oven or heater damper at a predetermined period of time.

Figure I is a front elevation of my damper operating device. Fig. II is a top plan view, part-ly in section. Fig. III is a side elevation, partly in section.

In the drawings 1 designates a bracket that may be secured to a wall or suitable support, which is provided with upper and lower perforated guide lugs 2 and 3, in which a damper setting rod 4 is slidably tted. The rod 4 is provided at one end with a handle 5, which may be grasped to adjust the rod in the guide lugs, and which is surrounded adjacent to said handle with a buffer spring 6 adapted to contact with the upper guide lug 2 for cushioning actiony when the rod is dropped in the adjustment of a damper previously held in the set position by said rod.

'7 is a chain, or other from the end of the shown).

S designates a normally inclined gripping latch by which the damper setting rod is frctionally held from movement when it is adjusted to control a damper connected thereto. fitted at its rear end to the bracket 1, is provided intermediate of its ends with an aperture normally inclined to and through i which the damper setting rod extends, and at the outer end of the finger 9 adapted to be engaged by a member to be hereinafter more particularly mentioned, through the medium of which the gripping latch is tripped to bring it and its aperture to a horizontal position so as to g release said rod` The gripping latch 8 being pivotally mounted and with its aperture in connection, leading damper setting rod i farthest from the handle 5 to a damper, (not j This gripping latch is pivotallyi gripping latch is a I normally inclined position the upper edge of the inner wall of the aperture and the g lower edge of the outer wall of the aperture serve to frictionally grip the damper setting rod due to the weight of the latter tending j to move the gripping latch downwardly by i frictional contact therewith, in consequence of which the rod is frictionally gripped and i held from movement until the gripping latch is moved to overcome ythe 'gripping action by bringing the walls of the aperture j parallel with the' rod.

l() designates a trip arm supported by a pivot pin 11 secured to the bracket .1, and so t located as to permit of'an extension arm 11 of said trip arm being moved into Contact with the lower face of the latch finger 9 to i elevate the gripping latch into horizontal j poition and release the damper setting iro 4. l 12 is a spring tted to the pivot pin 11 and provided with an arm 12 that engages lthe trip arm 10,l and serves to impart a movement to said trip arm toward and into i engagement with the finger of the gripping |I latch 8 when said trip arm is released in a 1 manner to be hereinafter explained. The j trip arm 10 is provided with a heel 13 loi cated at its end that is fitted to the pivot i` pin 11.

14 designates a trigger fitted to a pivot l pin 15 located adjacent to the pivot pin 11, the said trigger being provided witha finger 16 that engages the heel 13`of the trip arm 10. The 'trigger 14 is formed with a lever l arm adapted to be operated in a manner to be hereinafter explained, to release the f finger 16 from the heel of the trip arm 10, 1 and permit said trip Aarm to be actuated by the arm 12 of the spring 12 into operative engagement with the gripping latch 8, by f which theV damper setting rod 4 is gripped. It should be here noted that the spring 1,2 is continued from the pivot pin 11 tothe pivot pin 15 and is furnished with an arm which extends beneath the lever arm of the trigger 14, and serves to hold the finger 16 of said trigger in engagement with the heel 13 of the trip arm 10, when the damper j operating mechanism is adjusted to be automatically operated by clock mechanism to be subsequently described. i 17 designates a clock having a winding key 18 provided with a wind 19 by which i the lever arm of the trigger, 14 may be engaged to move said trigger and withdraw its finger 16 from the trip arm 10, for thepurpose of releasing the latter.

2O designates a clock supporting bracket in which the clock 17 is suitably mounted. This bracket is provided with perforated hinge ears 21 and 22 that coincide with perforated hinge ears 23 and 24 on the bracket 1, and through all of which a pivot pin 25 asses to connect the clock supporting bracket to the main bracket 1. The clock supporting bracket is normally held parallel with and immediately in front of the main bracket 1 by a spring 26 surrounding the pivot pin 25, and having its endsv arranged in engagement with the two brackets. The clock supporting bracket is provided with a stop lug 26 that extends rearwardly toward the main bracket 1, and serves to limit the movement of said bracket by the spring 26, in order that the winding` key 19 of the clock may not become clamped between said brackets.

The obj-ect in mounting the clock 17, as explained, is to permit of said clock being normally in a position that will provide for the winding key 19 coperating with the lever arm of the trigger 14, and allow said clock to be swung away from the main bracket 1 to afford access to its rear side for the purpose of winding and setting it.

Nhen my damper operating device is to be put in service, the damper setting rod 4 is adjusted to the desired degree in the guide lugs 2 and 3, by which action a pull is eX- erted upon the chain 7 connected with the damper, with the result of adjusting such damper to a position that will cause it to exert a constant pull upon said chain. Upon the setting rod 4 being released, said rod is gripped by the pivotally mounted latch, due to the binding of the rear and front walls of the aperture in said gripping latch through which the rod extends against the latter. This gripping action is maintained as long as the gripping latch remains in. a tilted position.

To adjust the clock operated devices by which the latch 8 is released, the trip arm 10 is moved downwardly to the position illustrated in Fig. I, thereby placing the spring arm 12 under tension, and providing for such spring arm being engaged by the finger 16 of the trigger 14. Vhen the parts have been thus adjusted, the lever arm of the trigger 14 is located back of the clock 17, and is in a posit-ion to be engaged by the winding key of the alarm attachment of said clock, so that when said winding key rotates in the path of said lever arm at predetermined time for which the alarm attachment of the clock has been set, the trigger 14 will be operated and permit operation of the trip arm 10 under the intiuence'of the spring arm 12. The trip arm 10, upon l being released, moves fo-rcibly under the influence of said spring arm in the direction indicated by the arrows, Fig. I, and strikes the finger 9 of the gripping latch 8, whereby said gripping latch is swung upwardly from its downwardly turned position, thus freeing the damper operating rod 4, in order that the damper controlled thereby may automatically assume the position it is desired it should assume when the described mechanism is operated.

I claim z- 1. A damper operating device, comprising a damper setting rod, a gripping latch having an aperture and located with its aperture in normally inclined position to the rod and through which said rod extends, a trip member for lifting said latch from gripping engagement with said rod, means for operating said trip member, a clock having a winding key, and means operable by said winding key for normally holding said trip member in restraint.

2. A damper operating device, comprising a damper setting rod, a gripping latch having an aperture and located with its aperture in normally inclined position to the rod and through which said rod extends, a trip member for lifting said latch from gripping engagement with said rod, a spring for o-perating said trip member, a clock having a winding key, and means operable by said winding key whereby said trip member is normally held in restraint.

3. A damper operating device, comprising a damper setting rod, a gripping latch having an aperture and located with its aperture in normally inclined position to the rod and through which said rod extends, a pivotally mounted trip arm movable to said latch to lift it from gripping engagement with said rod, a trip arm operating spring, a trigger engaging said trip arm to hold it in restraint, and a clock having a winding key adapted to operate said trigger to release said trip arm and permit its movement into engagement with said latch.

4. A damper operating device comprising a main bracket, a damper setting member, means supported by said main bracket for gripping said ydamper setting member, a trip arm supported by said bracket adapted to be moved into engagement with said gripping means, means for operating said trip arm, a trigger by which said trip arm is held in restraint, a swinging bracket sup,- ported by said main bracket, and a clock mounted in said swinging bracket, the said clock being provided with a winding key adapted to move into engagement with said trigger when said clock supporting bracket is parallel with said main bracket.

5. A damper operating device comprising a bracket having upper and lower guide lugs, a gripping latch having an aperturel and pivoted to the bracket between the guide lugs, a damper setting rod extending through the guide lugs and the gripping latch and means for lifting the gripping latch for releasing the rod; the latch being located with its aperture in normally inclined position to the rod and With the upper edge of the inner Wall of the aperture and the lower edge of the outer Wall of the aperture frictionally engaging the rod for 10 normally supporting the latter until the latch is lifted.

RALPH B. RYAN. In the-presence of- A. J. MCCAULEY, E. B. LINN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

, Washington, I). C. 

